Bedstead-ball.



N0. 629,598. Patented july 25,- I899;

W. H. PERKINS.

BEDSTEAD BALL.

(Application filed Mar. 9, 1899.)

(No Model.)

' UNITED STATES PATENT WALTER I-I. PERKINS, OF WATERBURY, CONNECTICUT, ASSIGNOR TO THE WATERBURY MANUFACTURING COMPANY, OF SAME PLACE.

BEDSTEAD-BALL.

SPEGIFICATION forming part Of Letters Patent N0. 629,598, dated July 25, 1899.

Application filed May 9, 1899. Serial No. 708,361. (No model.)

To all whom it may concern.-

Be it known that 1-, WALTER H. PERKINS, of Waterbury, in the county of New Haven and State of Connecticut, have invented a new Imthe letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent, in

Figure l, aview in elevation of-a bedsteadball constructed in accordance with my invention Fig. 2, aview thereof in central section Fig. 3, a detached enlarged broken sectional view of the upper end of the base; Fig. 4, a corresponding view showing .the joint finally formed between the base and the knob after the edge of the knob has been entered into the locking-recess of the base and the shoulder of the base has been upset to form a retaining-lip.

My invention relates to an improvement in sheet-metal bedstead-balls, the object being to produce without the use of solder a cheap and strong bedstead-ball of superior appearance.

With these ends in View myinvention consists in a bedstead-ball having certaindetails of construction, as will be hereinafter de-' scribed, and pointed out in the claim.

In carrying out my invention as herein shown I make the upper portion of the sheetmetal base A with a horizontal annular shoulder a and with an annular vertical abutment-flange a and form an inclined annular locking-recess a at the convergence of the said shoulder and abutment-flange. As shown, the shoulder is produced by folding the metal of the blank from which it is formed upon itself. The pitch of the said recess a corresponds to the pitch of the edge b of the knob or pommel B, which is also formed of sheet metal and which has in its lower face an openin g large enough to receive the flange a of the base A. After the said flange has been inserted into the said opening, through shoulder a of the base is upset by spinning or otherwise, so as to form a retainingdip a as clearly shown in Fig. 4,'whereby the knob is firmly united without the aid of solder to the base A, the abutment-flange a preventing the edge of the thin sheet-metal knob from being crushed inward during this spinning operation and forming, as it were, an anvil therefor.

. I am aware that it is old to form the knob and base of a bedstead-ball independently of each other and'attach them together without the use of solder. I do not therefore claim that construction broadly; but,

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

In a sheetmetal bedstead-ball, the combination with a sheet-metal knob having a. circular opening formed in its lower face, of a sheet-metal base having an annular shoulder, an annular vertical abutment-flange and an inclined annular locking-recess extending downward and inward from the inner edge of the said shoulder, and adapted to receive the edge of the knob around the said opening witnesses. v

- WALTER I-I. PERKINS.

Witnesses: I

- J NO. S. NEAGLE, T. W. WALSH: 

